If you are on  a windows PC, and your default browser has switched to Microsoft Edge, follow these steps to set it back to Google Chrome. 

• On the task bar, in the search type in "default apps" and click on it. 

• In the "Set a default for a file type or link type" field type in .html and click on it.

• Click on Microsoft Edge and then replace with Google Chrome. Click Set default. 

This will replace it with Google Chrome so that it will open by default.